Improvement in drying-cylinders for drying paper, warp-threads



UNITED STATES PATENT OFFICE.

M. A. FURBUSH, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN DRYING-CYLINDERS FOR DRYING PAPER, WARP-THREADS, dc.

Specification forming part o1" Letters Patent No. 44.524, dated October 4, ISG-l To all whom, t may concern.-

Be it known that I, M. A. FURBUsH, of

Philadelphia, Pennyslvania, have invented an Improved DryingGylinder, and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon. Myimproved drying-cylinder consists of an exterior cylindrical casing caused to revolve round (but not iu contact with) and to derive its heat from an inner cylindrical casing to which steam is admitted.

The object of my invention is to avoid the use of the stuffing-boxes which are necessarily employed in connection with ordinary dryingcylinders, and which are apt to leak and permit the escape of steam, to the detriment of the warp-threads, paper, or other material to bc dried.

In order to enable others skilled in the art to make and use my invention, I willnow proceed to describe its construction and operalion.

On reference to the accompanying drawings, which forms apart of this specification, Figure 1 is a side View of sutcieut of a machine for drying warp-threads to illustate my invention, Fig. 2, a transverse vertical section on line l 2, Fig. l; Fig. 3, a transverse section of the drying cylinder, and Fig. 4 an end View of the same.

Similar letters refer to similar paris throughout the several views.

A A represent the side frames of amachine for drying warp-threads which may be similar to other machines of this class in every particular, except the drying-cylinders and their bearings, to the construction of which my :invention especially appertains. Each dryingcylinder is composed of a cylindrical casing B, contained within an outer casing, C, the latter being as close as possible to the former without being in actual contact with it. The outer casing, C, has at cach end a tubular journal arranged to revolve on and with rollers b b, which are hung loosely to pins on a bracket, D, one bracket being secured to each frame. Through one of the journals a passes atube, F, communicating with a pipe, G, through which steam is introduced into the interior of the cylinder, and through the opposite journal passes a tube, F', projecting intov the inner casing, B, within which it is bent at right angles, this tube serving as a passage for the steam from the casing B to the waste-pipe H. Both of the tubes F and F are permanently secured to or form a part of the inner or cylindrical casing, which, with the pipes G a H, remains stationary, while the outer casing is caused to revolve by the warp-thread or paper which traverses in contact with it. By this arrangement I avoid the use of the stuffing-boxes which are employed in connection with ordinary drying cylinders, and which are a source of much annoy ance on account of their liability to leak and permit the escape of stean1,to the injury of the warp-thread, paper, -or other material to be dried. By causing the outer casing to revolve in close contiguity, but not in absolute contact with the inner casing, sufficient heat is transmitted from the latter to the former to give the desired drying effect.

I claim as my invention and desire to secure by Letters Patent- A dryingcylinder consisting of an exterior cylindrical casing caused to revolve around (but not in contact with) and to derive its heat from an inner cylindrical casing to which steam is admitted, all substantially as and for the purpose herein set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

M. A.- F URBUSH.

XVitnesses:

HENRY HowsoN, J oi-TN WHITE. 

